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https://www.readbyqxmd.com/read/29331431/robust-synchronization-of-master-slave-chaotic-systems-using-approximate-model-an-experimental-study
#1
Hafiz Ahmed, Ivan Salgado, Héctor Ríos
Robust synchronization of master slave chaotic systems are considered in this work. First an approximate model of the error system is obtained using the ultra-local model concept. Then a Continuous Singular Terminal Sliding-Mode (CSTSM) Controller is designed for the purpose of synchronization. The proposed approach is output feedback-based and uses fixed-time higher order sliding-mode (HOSM) differentiator for state estimation. Numerical simulation and experimental results are given to show the effectiveness of the proposed technique...
January 10, 2018: ISA Transactions
https://www.readbyqxmd.com/read/29320505/methodology-of-mixed-load-customized-bus-lines-and-adjustment-based-on-time-windows
#2
ZhiJie Li, Rui Song, Shiwei He, Mingkai Bi
Custom bus routes need to be optimized to meet the needs of a customized bus for personalized trips of different passengers. This paper introduced a customized bus routing problem in which trips for each depot are given, and each bus stop has a fixed time window within which trips should be completed. Treating a trip as a virtual stop was the first consideration in solving the school bus routing problem (SBRP). Then, the mixed load custom bus routing model was established with a time window that satisfies its requirement and the result were solved by Cplex software...
2018: PloS One
https://www.readbyqxmd.com/read/29315790/a-work-for-food-enrichment-program-increases-exploration-and-decreases-stereotypies-in-four-species-of-bears
#3
Jason D Wagman, Kristen E Lukas, Patricia M Dennis, Mark A Willis, Joe Carroscia, Curt Gindlesperger, Mandi W Schook
Zoo-housed bears are prone to exhibiting stereotypic behaviors, generally considered indicators of negative welfare. We explored the effects of a variable-time feeding enrichment schedule on behavioral indicators of welfare in four bear species at Cleveland Metroparks Zoo. We distributed the diets of eight bears in one of five enrichment items, for two consecutive days each, and monitored behavior throughout the day. In Experiment 1, we compared variable-time to fixed-time presentation of enrichment over two, 10-day periods...
January 7, 2018: Zoo Biology
https://www.readbyqxmd.com/read/29278245/optimizing-preventive-maintenance-policy-a-data-driven-application-for-a-light-rail-braking-system
#4
Francesco Corman, Sander Kraijema, Milinko Godjevac, Gabriel Lodewijks
This article presents a case study determining the optimal preventive maintenance policy for a light rail rolling stock system in terms of reliability, availability, and maintenance costs. The maintenance policy defines one of the three predefined preventive maintenance actions at fixed time-based intervals for each of the subsystems of the braking system. Based on work, maintenance, and failure data, we model the reliability degradation of the system and its subsystems under the current maintenance policy by a Weibull distribution...
October 2017: Proc Inst Mech Eng O J Risk Reliab
https://www.readbyqxmd.com/read/29275034/the-ability-to-predict-pregnancy-loss-in-cattle-with-elisas-that-detect-pregnancy-associated-glycoproteins-is-antibody-dependent
#5
Ahmed O Gatea, Michael F Smith, Ky G Pohler, Tina Egen, Marcos H C Pereira, José L M Vasconselos, John C Lawrence, Jonathan A Green
The concentration of circulating pregnancy associated glycoproteins (PAGs) early in pregnancy may serve as markers to predict late embryonic mortality or fetal mortality in cattle. In this study, pregnancies were established in dairy cows, by either fixed-time AI (FTAI) or fixed-time embryo transfer (FTET) with in vitro produced embryos. Circulating PAGs were measured with different combinations of antibodies in either a laboratory-based ELISA or a commercial ELISA. For the in-house ELISA, three monoclonal 'trapping' antibodies (A6, J2, and L4) and two polyclonal 'detection' antisera (antibodies F2 or 45) were used to quantify PAGs in serum from the same cows...
December 14, 2017: Theriogenology
https://www.readbyqxmd.com/read/29274053/pregnancy-rate-in-water-buffalo-following-fixed-time-artificial-insemination-using-new-or-used-intravaginal-devices-with-two-progesterone-concentrations
#6
J C Gutiérrez-Añez, R A Palomares, J R Jiménez-Pineda, A R Camacho, G E Portillo-Martínez
This study evaluated the pregnancy rate (PR) after timed artificial insemination (TAI) in water buffalo (Bubalus bubalis) during both non-breeding and breeding season, using either a new or reused intravaginal device (IVD) with two different progesterone concentrations. A total of 247 dairy buffalo cows were randomly assigned using a two-by-three factorial design and four replicates to the following groups: (1) new intravaginal device (IVD-New: DIB®, 1.0 g of P4, n = 51 or CIDR®, 1.38 g of P4, n = 55); (2) intravaginal device previously used once (9 days) (IVD-Used1x: DIB, n = 40 or CIDR, n = 51); or (3) intravaginal device previously used twice (18 days) (IVD-Used2x: DIB, n = 27 or CIDR, n = 23)...
December 22, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29249328/monitoring-and-controlling-follicular-activity-in-camelids
#7
Ahmed Tibary
This paper reviews that state of our knowledge concerning follicular wave dynamics, monitoring and manipulation. All camelids have overlapping follicular waves in absence of ovulation which is induced by a seminal plasma factor (βNGF). The interval between follicular waves varies. The size of the ovulatory follicle varies between 11 and 25 mm in camels and between in 6 and 13 mm in South American Camelids. The interval between induction of ovulation and next ovulatory follicle is 15 ± 1 day for all camelids...
December 8, 2017: Theriogenology
https://www.readbyqxmd.com/read/29248502/a-continuous-assay-for-l-talarate-galactarate-dehydratase-using-circular-dichroism
#8
Nicole M Easton, Sarah A E Aboushawareb, Stephen L Bearne
l-Talarate/galactarate dehydratase (TGD) is a member of the enolase superfamily of enzymes and catalyzes the dehydration of either meso-galactarate or l-talarate to form 5-keto-4-deoxy-d-glucarate (5-KDG). To facilitate study of this enzyme and other galactarate dehydratases, a continuous circular dichroism-based assay has been developed. Using recombinant enzyme from Salmonella typhimuium (StTGD), the rates of StTGD-catalyzed conversion of m-galactarate to 5-KDG were determined by following the change in ellipticity at 323 nm...
December 14, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29248217/effect-of-aluminized-reflective-hutch-covers-on-calf-health-and-performance
#9
D Manriquez, H Valenzuela, S Paudyal, A Velasquez, P J Pinedo
The effect of polyethylene hutches wrapped in aluminized reflective covers (ARC) on health and performance of pre-weaned Holstein heifers during summer was evaluated. Ambient and hutch temperature and temperature-humidity index (THI) were also assessed. The study was conducted from June to October 2016 where temperature, humidity, and THI ranged from -1.3 to 38.4°C, 9.8 to 99.7%, and 33.6 to 81.1 units, respectively. Heifers enrolled at 1 d of life and housed in individual polyethylene hutches with (covered) or without (control) ARC were monitored until 60 d of life in 2 study groups (SG1, n = 94, monitored from June to September; and SG2, n = 101, monitored from August to October 2016)...
December 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29246977/temporal-specificity-in-pavlovian-to-instrumental-transfer
#10
Matthew S Matell, Rebecca B Della Valle
Presentation of a previously trained Pavlovian conditioned stimulus while an organism is engaged in operant responding can moderate the rate of responding, a phenomenon known as Pavlovian-to-instrumental transfer. Although it is well known that Pavlovian contingencies will generate conditioned behavior that is temporally organized with respect to the arrival of the predicted outcome, little work has examined the temporal dynamics of responding during Pavlovian-instrumental transfer. We trained rats using a fixed time 60-sec, fixed time 120-sec, or random time 60-sec schedule in an appetitive Pavlovian task, and found that presentation of the conditioned stimulus potentiated operant responding in a manner that reflected these previously established temporal expectancies...
January 2018: Learning & Memory
https://www.readbyqxmd.com/read/29226457/investigation-of-in-vitro-measurable-sperm-attributes-and-their-influence-on-electroejaculated-bull-semen-with-a-fixed-time-artificial-insemination-protocol-in-australian-bos-indicus-cattle
#11
N Satake, Saa Edwards, D Tutt, M R McGowan, G B Boe-Hansen
Increasing use of fixed-time artificial insemination (FTAI) in beef cattle production has presented an opportunity for the use of fresh or chilled semen as an alternative to standard cryopreserved semen. The objective of this study was to examine in vitro sperm function and pregnancy rate of electroejaculated semen, chilled and stored for 48 hr, compared to conventionally cryopreserved semen with an optimized FTAI protocol in Brahman cattle. Semen from three Brahman bulls was collected, and aliquots were extended in either chilled (at 5°C) or frozen (LN2 ) in a Tris-egg yolk extender base with 2...
December 11, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29219506/nonspherically-symmetric-collapse-in-asymptotically-ads-spacetimes
#12
Hans Bantilan, Pau Figueras, Markus Kunesch, Paul Romatschke
We numerically simulate gravitational collapse in asymptotically anti-de Sitter spacetimes away from spherical symmetry. Starting from initial data sourced by a massless real scalar field, we solve the Einstein equations with a negative cosmological constant in five spacetime dimensions and obtain a family of nonspherically symmetric solutions, including those that form two distinct black holes on the axis. We find that these configurations collapse faster than spherically symmetric ones of the same mass and radial compactness...
November 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29198975/improvement-of-bovine-in%C3%A2-vitro-embryo-production-by-ovarian-follicular-wave-synchronization-prior-to-ovum-pick-up
#13
F L B Cavalieri, F Morotti, M M Seneda, A H B Colombo, M A Andreazzi, I P Emanuelli, L P Rigolon
This study evaluated the effects of the synchronization of ovarian follicular wave emergence on the efficiency of in vitro embryo production. Bos indicus cows (n = 20) were divided into two groups (control vs. synchronization) and subjected to repeated ovum pick-up (OPU) sessions (8 replicates each, with an interval of 21 days in a 2 × 2 crossover design) and subsequent in vitro embryo production. Cows in the control group (n = 10) were submitted to OPU procedures without any stimulation every 21 days...
November 26, 2017: Theriogenology
https://www.readbyqxmd.com/read/29192271/tailoring-magnetic-properties-of-multicomponent-layered-structure-via-current-annealing-in-fepd-thin-films
#14
Matteo Cialone, Federica Celegato, Marco Coïsson, Gabriele Barrera, Gianluca Fiore, Ruslan Shvab, Uta Klement, Paola Rizzi, Paola Tiberto
Multicomponent layered systems with tailored magnetic properties were fabricated via current annealing from homogeneous Fe67Pd33 thin films, deposited via radio frequency sputtering on Si/SiO2 substrates from composite target. To promote spontaneous nano-structuring and phase separation, selected samples were subjected to current annealing in vacuum, with a controlled oxygen pressure, using various current densities for a fixed time and, as a consequence, different phases and microstructures were obtained. In particular, the formation of magnetite in different amount was observed beside other iron oxides and metallic phases...
November 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29169839/cardiopulmonary-effects-of-anaesthesia-maintained-by-propofol-infusion-versus-isoflurane-inhalation-in-cheetahs-acinonyx-jubatus
#15
Roxanne K Buck, Adrian Sw Tordiffe, Gareth E Zeiler
OBJECTIVE: To compare the cardiopulmonary effects of propofol total intravenous anaesthesia (TIVA) with isoflurane in cheetahs (Acinonyx jubatus) to evaluate feasibility for field use. STUDY DESIGN: Prospective clinical study. ANIMALS: A group of 24 adult cheetahs, 12 per group. METHODS: Cheetahs were immobilized with zolazepam/tiletamine (1.2 mg kg-1) and medetomidine [40 μg kg-1, both intramuscular (IM)] by darting...
June 23, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29161976/a-new-approach-for-the-determination-of-ecap-thresholds
#16
Sebastian Hoth, Philipp Spitzer, Mark Praetorius
BACKGROUND: Electrically evoked compound action potentials (ECAPs) of the auditory nerve are routinely recorded for testing the cochlear implant integrity and its functional connection to the auditory system. The response thresholds derived from ECAP recordings are widely used as a helpful guide in the fitting of the dynamic range of electric stimulation, although they may not always predict the behavioral thresholds of individuals well. Conventionally, this threshold is based on the identification of a minimum N peak and maximum P peak and linear extrapolation of the resulting amplitude growth function (AGF)...
November 22, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/29161658/reproductive-performance-of-lactating-dairy-cows-after-inducing-ovulation-using-hcg-in-a-five-day-progesterone-based-fixed-time-ai-protocol
#17
I Garcia-Ispierto, F De Rensis, X Casas, F Caballero, R Mur-Novales, F López-Gatius
This study compares the effects of inducing ovulation using human chorionic gonadotropin (hCG) or gonadotropin releasing hormone (GnRH) at the end of a 5-day progesterone(P4)-based protocol for fixed-time artificial insemination (FTAI) in lactating dairy cows on ovarian dynamics and fertility. A P4 intravaginal device (PRID) was fitted for five days and GnRH administered upon PRID insertion and a double dose (24 h apart) of prostaglandin F2α upon PRID removal. Cows received either GnRH (GnRH group; n = 98), 1000 IU hCG (hCG-1 group; n = 97), or 3000 IU hCG (hCG-2 group; n = 104) 36 h after PRID removal and were inseminated 50-56 h after PRID removal...
November 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/29157766/safety-of-rolled-and-folded-cotton-blankets-warmed-in-130%C3%A2-f-and-200%C3%A2-f-cabinets
#18
Patricia A Kelly, Elizabeth C Morse, Joslin V Swanfeldt, Amy N Adams, Craig G Crandall, Debby A Rush, Mary L Krogh, Susan K Cooper
PURPOSE: In 2014, ECRI recommended that blanket warming cabinets be set at a maximum temperature of 130°F because of safety concerns with warmed rolled and folded blankets. We could find no research to support this recommendation. The purpose of this study was to measure skin temperatures and thermal comfort in healthy volunteers before and after application of folded and rolled dry cotton blankets warmed in 130°F or 200°F cabinets. DESIGN: Randomized, descriptive, and comparative study...
December 2017: Journal of Perianesthesia Nursing: Official Journal of the American Society of PeriAnesthesia Nurses
https://www.readbyqxmd.com/read/29156149/quantitative-evaluation-of-vertebral-microvascular-permeability-and-fat-fraction-in-alloxan-induced-diabetic-rabbits
#19
Lei Hu, Yun Fei Zha, Li Wang, Liang Li, Dong Xing, Wei Gong, Jiao Wang, Yuan Lin, Fei Fei Zeng, Xue Song Lu
Purpose To determine longitudinal relationships between lumbar vertebral bone marrow permeability and marrow adipose tissue in a rabbit diabetes model by using quantitative dynamic contrast agent-enhanced (DCE) magnetic resonance (MR) imaging and iterative decomposition of water and fat with the echo asymmetry and least-squares estimation quantitation (IDEAL IQ) sequence. Materials and Methods Twenty rabbits were randomly assigned to the diabetic (n = 10) or control (n = 10) group. All rabbits underwent sagittal MR imaging of the lumbar region at fixed time points (0, 4, 8, 12, and 16 weeks after alloxan injection)...
November 20, 2017: Radiology
https://www.readbyqxmd.com/read/29153182/a-100-year-review-cheese-production-and-quality
#20
M E Johnson
In the beginning, cheese making in the United States was all art, but embracing science and technology was necessary to make progress in producing a higher quality cheese. Traditional cheese making could not keep up with the demand for cheese, and the development of the factory system was necessary. Cheese quality suffered because of poor-quality milk, but 3 major innovations changed that: refrigeration, commercial starters, and the use of pasteurized milk for cheese making. Although by all accounts cold storage improved cheese quality, it was the improvement of milk quality, pasteurization of milk, and the use of reliable cultures for fermentation that had the biggest effect...
December 2017: Journal of Dairy Science
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